/*
* After a change in the NPmode for some NP, move packets from the
* npqueue to the send queue or the fast queue as appropriate.
* Should be called at splsoftnet.
*/
static void
ppp_requeue(struct ppp_softc *sc)
{
struct mbuf *m, **mpp;
struct ifqueue *ifq;
enum NPmode mode;
int error;
splsoftassert(IPL_SOFTNET);
for (mpp = &sc->sc_npqueue; (m = *mpp) != NULL; ) {
switch (PPP_PROTOCOL(mtod(m, u_char *))) {
case PPP_IP:
mode = sc->sc_npmode[NP_IP];
break;
default:
mode = NPMODE_PASS;
}
switch (mode) {
case NPMODE_PASS:
/*
* This packet can now go on one of the queues to be sent.
*/
*mpp = m->m_nextpkt;
m->m_nextpkt = NULL;
if (m->m_flags & M_HIGHPRI) {
ifq = &sc->sc_fastq;
if (IF_QFULL(ifq)) {
IF_DROP(ifq);
m_freem(m);
error = ENOBUFS;
}
else {
IF_ENQUEUE(ifq, m);
error = 0;
}
} else
IFQ_ENQUEUE(&sc->sc_if.if_snd, m, NULL, error);
if (error) {
sc->sc_if.if_oerrors++;
sc->sc_stats.ppp_oerrors++;
}
break;
case NPMODE_DROP:
case NPMODE_ERROR:
*mpp = m->m_nextpkt;
m_freem(m);
break;
case NPMODE_QUEUE:
mpp = &m->m_nextpkt;
break;
}
}
sc->sc_npqtail = mpp;
}
int
looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
struct rtentry *rt)
{
pktqueue_t *pktq = NULL;
struct ifqueue *ifq = NULL;
int s, isr = -1;
int csum_flags;
size_t pktlen;
MCLAIM(m, ifp->if_mowner);
KASSERT(KERNEL_LOCKED_P());
if ((m->m_flags & M_PKTHDR) == 0)
panic("looutput: no header mbuf");
if (ifp->if_flags & IFF_LOOPBACK)
bpf_mtap_af(ifp, dst->sa_family, m);
m->m_pkthdr.rcvif = ifp;
if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
m_freem(m);
return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
}
pktlen = m->m_pkthdr.len;
ifp->if_opackets++;
ifp->if_obytes += pktlen;
#ifdef ALTQ
/*
* ALTQ on the loopback interface is just for debugging. It's
* used only for loopback interfaces, not for a simplex interface.
*/
if ((ALTQ_IS_ENABLED(&ifp->if_snd) || TBR_IS_ENABLED(&ifp->if_snd)) &&
ifp->if_start == lostart) {
struct altq_pktattr pktattr;
int error;
/*
* If the queueing discipline needs packet classification,
* do it before prepending the link headers.
*/
IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT);
if (m == NULL)
return (ENOBUFS);
*(mtod(m, uint32_t *)) = dst->sa_family;
s = splnet();
IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
(*ifp->if_start)(ifp);
splx(s);
return (error);
}
#endif /* ALTQ */
m_tag_delete_nonpersistent(m);
#ifdef MPLS
if (rt != NULL && rt_gettag(rt) != NULL &&
rt_gettag(rt)->sa_family == AF_MPLS &&
(m->m_flags & (M_MCAST | M_BCAST)) == 0) {
union mpls_shim msh;
msh.s_addr = MPLS_GETSADDR(rt);
if (msh.shim.label != MPLS_LABEL_IMPLNULL) {
ifq = &mplsintrq;
isr = NETISR_MPLS;
}
}
if (isr != NETISR_MPLS)
#endif
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
csum_flags = m->m_pkthdr.csum_flags;
KASSERT((csum_flags & ~(M_CSUM_IPv4|M_CSUM_UDPv4)) == 0);
if (csum_flags != 0 && IN_LOOPBACK_NEED_CHECKSUM(csum_flags)) {
ip_undefer_csum(m, 0, csum_flags);
}
m->m_pkthdr.csum_flags = 0;
pktq = ip_pktq;
break;
#endif
#ifdef INET6
case AF_INET6:
csum_flags = m->m_pkthdr.csum_flags;
KASSERT((csum_flags & ~M_CSUM_UDPv6) == 0);
if (csum_flags != 0 &&
IN6_LOOPBACK_NEED_CHECKSUM(csum_flags)) {
ip6_undefer_csum(m, 0, csum_flags);
}
m->m_pkthdr.csum_flags = 0;
m->m_flags |= M_LOOP;
pktq = ip6_pktq;
break;
#endif
#ifdef IPX
case AF_IPX:
ifq = &ipxintrq;
isr = NETISR_IPX;
break;
#endif
#ifdef NETATALK
case AF_APPLETALK:
ifq = &atintrq2;
isr = NETISR_ATALK;
break;
#endif
default:
printf("%s: can't handle af%d\n", ifp->if_xname,
dst->sa_family);
m_freem(m);
return (EAFNOSUPPORT);
}
s = splnet();
if (__predict_true(pktq)) {
int error = 0;
if (__predict_true(pktq_enqueue(pktq, m, 0))) {
ifp->if_ipackets++;
ifp->if_ibytes += pktlen;
} else {
m_freem(m);
error = ENOBUFS;
}
splx(s);
return error;
}
if (IF_QFULL(ifq)) {
IF_DROP(ifq);
m_freem(m);
splx(s);
return (ENOBUFS);
}
IF_ENQUEUE(ifq, m);
schednetisr(isr);
ifp->if_ipackets++;
ifp->if_ibytes += m->m_pkthdr.len;
splx(s);
return (0);
}
int
looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
struct rtentry *rt)
{
int s, isr;
struct ifqueue *ifq = NULL;
MCLAIM(m, ifp->if_mowner);
if ((m->m_flags & M_PKTHDR) == 0)
panic("looutput: no header mbuf");
#if NBPFILTER > 0
if (ifp->if_bpf && (ifp->if_flags & IFF_LOOPBACK))
bpf_mtap_af(ifp->if_bpf, dst->sa_family, m);
#endif
m->m_pkthdr.rcvif = ifp;
if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
m_freem(m);
return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
}
ifp->if_opackets++;
ifp->if_obytes += m->m_pkthdr.len;
#ifdef ALTQ
/*
* ALTQ on the loopback interface is just for debugging. It's
* used only for loopback interfaces, not for a simplex interface.
*/
if ((ALTQ_IS_ENABLED(&ifp->if_snd) || TBR_IS_ENABLED(&ifp->if_snd)) &&
ifp->if_start == lostart) {
struct altq_pktattr pktattr;
int error;
/*
* If the queueing discipline needs packet classification,
* do it before prepending the link headers.
*/
IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT);
if (m == NULL)
return (ENOBUFS);
*(mtod(m, uint32_t *)) = dst->sa_family;
s = splnet();
IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
(*ifp->if_start)(ifp);
splx(s);
return (error);
}
#endif /* ALTQ */
m_tag_delete_nonpersistent(m);
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
ifq = &ipintrq;
isr = NETISR_IP;
break;
#endif
#ifdef INET6
case AF_INET6:
m->m_flags |= M_LOOP;
ifq = &ip6intrq;
isr = NETISR_IPV6;
break;
#endif
#ifdef ISO
case AF_ISO:
ifq = &clnlintrq;
isr = NETISR_ISO;
break;
#endif
#ifdef IPX
case AF_IPX:
ifq = &ipxintrq;
isr = NETISR_IPX;
break;
#endif
#ifdef NETATALK
case AF_APPLETALK:
ifq = &atintrq2;
isr = NETISR_ATALK;
break;
#endif
default:
printf("%s: can't handle af%d\n", ifp->if_xname,
dst->sa_family);
m_freem(m);
return (EAFNOSUPPORT);
}
s = splnet();
if (IF_QFULL(ifq)) {
IF_DROP(ifq);
m_freem(m);
splx(s);
return (ENOBUFS);
}
IF_ENQUEUE(ifq, m);
// schednetisr(isr);
ifp->if_ipackets++;
ifp->if_ibytes += m->m_pkthdr.len;
splx(s);
return (0);
}
/*
* Send an EAPOL-Key frame to node `ni'. If MIC or encryption is required,
* the PTK must be passed (otherwise it can be set to NULL.)
*/
int
ieee80211_send_eapol_key(struct ieee80211com *ic, struct mbuf *m,
struct ieee80211_node *ni, const struct ieee80211_ptk *ptk)
{
struct ifnet *ifp = &ic->ic_if;
struct ether_header *eh;
struct ieee80211_eapol_key *key;
u_int16_t info;
int s, len, error;
M_PREPEND(m, sizeof(struct ether_header), M_DONTWAIT);
if (m == NULL)
return ENOMEM;
/* no need to m_pullup here (ok by construction) */
eh = mtod(m, struct ether_header *);
eh->ether_type = htons(ETHERTYPE_PAE);
IEEE80211_ADDR_COPY(eh->ether_shost, ic->ic_myaddr);
IEEE80211_ADDR_COPY(eh->ether_dhost, ni->ni_macaddr);
key = (struct ieee80211_eapol_key *)&eh[1];
key->version = EAPOL_VERSION;
key->type = EAPOL_KEY;
key->desc = (ni->ni_rsnprotos == IEEE80211_PROTO_RSN) ?
EAPOL_KEY_DESC_IEEE80211 : EAPOL_KEY_DESC_WPA;
info = BE_READ_2(key->info);
/* use V3 descriptor if KDF is SHA256-based */
if (ieee80211_is_sha256_akm(ni->ni_rsnakms))
info |= EAPOL_KEY_DESC_V3;
/* use V2 descriptor if pairwise or group cipher is CCMP */
else if (ni->ni_rsncipher == IEEE80211_CIPHER_CCMP ||
ni->ni_rsngroupcipher == IEEE80211_CIPHER_CCMP)
info |= EAPOL_KEY_DESC_V2;
else
info |= EAPOL_KEY_DESC_V1;
BE_WRITE_2(key->info, info);
len = m->m_len - sizeof(struct ether_header);
BE_WRITE_2(key->paylen, len - sizeof(*key));
BE_WRITE_2(key->len, len - 4);
#ifndef IEEE80211_STA_ONLY
if (info & EAPOL_KEY_ENCRYPTED) {
if (ni->ni_rsnprotos == IEEE80211_PROTO_WPA) {
/* clear "Encrypted" bit for WPA */
info &= ~EAPOL_KEY_ENCRYPTED;
BE_WRITE_2(key->info, info);
}
ieee80211_eapol_key_encrypt(ic, key, ptk->kek);
if ((info & EAPOL_KEY_VERSION_MASK) != EAPOL_KEY_DESC_V1) {
/* AES Key Wrap adds 8 bytes + padding */
m->m_pkthdr.len = m->m_len =
sizeof(*eh) + 4 + BE_READ_2(key->len);
}
}
#endif
if (info & EAPOL_KEY_KEYMIC)
ieee80211_eapol_key_mic(key, ptk->kck);
len = m->m_pkthdr.len;
s = splnet();
#ifndef IEEE80211_STA_ONLY
/* start a 100ms timeout if an answer is expected from supplicant */
if (info & EAPOL_KEY_KEYACK)
timeout_add_msec(&ni->ni_eapol_to, 100);
#endif
IFQ_ENQUEUE(&ifp->if_snd, m, NULL, error);
if (error == 0) {
ifp->if_obytes += len;
if ((ifp->if_flags & IFF_OACTIVE) == 0)
(*ifp->if_start)(ifp);
}
splx(s);
return error;
}
/*
* Queue a packet. Start transmission if not active.
* Packet is placed in Information field of PPP frame.
*/
int
pppoutput(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
struct rtentry *rtp)
{
struct ppp_softc *sc = ifp->if_softc;
int protocol, address, control;
u_char *cp;
int s, error;
struct ip *ip;
struct ifqueue *ifq;
enum NPmode mode;
int len;
if (sc->sc_devp == NULL || (ifp->if_flags & IFF_RUNNING) == 0
|| ((ifp->if_flags & IFF_UP) == 0 && dst->sa_family != AF_UNSPEC)) {
error = ENETDOWN; /* sort of */
goto bad;
}
#ifdef DIAGNOSTIC
if (ifp->if_rdomain != rtable_l2(m0->m_pkthdr.ph_rtableid)) {
printf("%s: trying to send packet on wrong domain. "
"if %d vs. mbuf %d, AF %d\n", ifp->if_xname, ifp->if_rdomain,
rtable_l2(m0->m_pkthdr.ph_rtableid), dst->sa_family);
}
#endif
/*
* Compute PPP header.
*/
m0->m_flags &= ~M_HIGHPRI;
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
address = PPP_ALLSTATIONS;
control = PPP_UI;
protocol = PPP_IP;
mode = sc->sc_npmode[NP_IP];
/*
* If this packet has the "low delay" bit set in the IP header,
* put it on the fastq instead.
*/
ip = mtod(m0, struct ip *);
if (ip->ip_tos & IPTOS_LOWDELAY)
m0->m_flags |= M_HIGHPRI;
break;
#endif
case AF_UNSPEC:
address = PPP_ADDRESS(dst->sa_data);
control = PPP_CONTROL(dst->sa_data);
protocol = PPP_PROTOCOL(dst->sa_data);
mode = NPMODE_PASS;
break;
default:
printf("%s: af%d not supported\n", ifp->if_xname, dst->sa_family);
error = EAFNOSUPPORT;
goto bad;
}
/*
* Drop this packet, or return an error, if necessary.
*/
if (mode == NPMODE_ERROR) {
error = ENETDOWN;
goto bad;
}
if (mode == NPMODE_DROP) {
error = 0;
goto bad;
}
/*
* Add PPP header. If no space in first mbuf, allocate another.
* (This assumes M_LEADINGSPACE is always 0 for a cluster mbuf.)
*/
M_PREPEND(m0, PPP_HDRLEN, M_DONTWAIT);
if (m0 == 0) {
error = ENOBUFS;
goto bad;
}
cp = mtod(m0, u_char *);
*cp++ = address;
*cp++ = control;
*cp++ = protocol >> 8;
*cp++ = protocol & 0xff;
if ((m0->m_flags & M_PKTHDR) == 0)
panic("mbuf packet without packet header!");
len = m0->m_pkthdr.len;
if (sc->sc_flags & SC_LOG_OUTPKT) {
printf("%s output: ", ifp->if_xname);
pppdumpm(m0);
}
if ((protocol & 0x8000) == 0) {
#if NBPFILTER > 0
/*
* Apply the pass and active filters to the packet,
* but only if it is a data packet.
*/
*mtod(m0, u_char *) = 1; /* indicates outbound */
if (sc->sc_pass_filt.bf_insns != 0
&& bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0,
len, 0) == 0) {
error = 0; /* drop this packet */
goto bad;
}
/*
* Update the time we sent the most recent packet.
*/
if (sc->sc_active_filt.bf_insns == 0
|| bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
sc->sc_last_sent = time_second;
*mtod(m0, u_char *) = address;
#else
/*
* Update the time we sent the most recent packet.
*/
sc->sc_last_sent = time_second;
#endif
}
#if NBPFILTER > 0
/*
* See if bpf wants to look at the packet.
*/
if (sc->sc_bpf)
bpf_mtap(sc->sc_bpf, m0, BPF_DIRECTION_OUT);
#endif
/*
* Put the packet on the appropriate queue.
*/
s = splsoftnet();
if (mode == NPMODE_QUEUE) {
/* XXX we should limit the number of packets on this queue */
*sc->sc_npqtail = m0;
m0->m_nextpkt = NULL;
sc->sc_npqtail = &m0->m_nextpkt;
} else {
if (m0->m_flags & M_HIGHPRI) {
ifq = &sc->sc_fastq;
if (IF_QFULL(ifq) && dst->sa_family != AF_UNSPEC) {
IF_DROP(ifq);
m_freem(m0);
error = ENOBUFS;
}
else {
IF_ENQUEUE(ifq, m0);
error = 0;
}
} else
IFQ_ENQUEUE(&sc->sc_if.if_snd, m0, NULL, error);
if (error) {
splx(s);
sc->sc_if.if_oerrors++;
sc->sc_stats.ppp_oerrors++;
return (error);
}
(*sc->sc_start)(sc);
}
ifp->if_opackets++;
ifp->if_obytes += len;
splx(s);
return (0);
bad:
m_freem(m0);
return (error);
}
/*
* Ethernet output routine.
* Encapsulate a packet of type family for the local net.
* Assumes that ifp is actually pointer to arpcom structure.
*/
int
ether_output(struct ifnet *ifp0, struct mbuf *m0, struct sockaddr *dst,
struct rtentry *rt0)
{
u_int16_t etype;
int s, len, error = 0;
u_char edst[ETHER_ADDR_LEN];
u_char *esrc;
struct mbuf *m = m0;
struct rtentry *rt;
struct mbuf *mcopy = NULL;
struct ether_header *eh;
struct arpcom *ac = (struct arpcom *)ifp0;
short mflags;
struct ifnet *ifp = ifp0;
#ifdef DIAGNOSTIC
if (ifp->if_rdomain != rtable_l2(m->m_pkthdr.ph_rtableid)) {
printf("%s: trying to send packet on wrong domain. "
"if %d vs. mbuf %d, AF %d\n", ifp->if_xname,
ifp->if_rdomain, rtable_l2(m->m_pkthdr.ph_rtableid),
dst->sa_family);
}
#endif
#if NTRUNK > 0
/* restrict transmission on trunk members to bpf only */
if (ifp->if_type == IFT_IEEE8023ADLAG &&
(m_tag_find(m, PACKET_TAG_DLT, NULL) == NULL))
senderr(EBUSY);
#endif
#if NCARP > 0
if (ifp->if_type == IFT_CARP) {
ifp = ifp->if_carpdev;
ac = (struct arpcom *)ifp;
if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) !=
(IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
}
#endif /* NCARP > 0 */
if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
senderr(ENETDOWN);
if ((rt = rt0) != NULL) {
if ((rt->rt_flags & RTF_UP) == 0) {
if ((rt0 = rt = rtalloc1(dst, RT_REPORT,
m->m_pkthdr.ph_rtableid)) != NULL)
rt->rt_refcnt--;
else
senderr(EHOSTUNREACH);
}
if (rt->rt_flags & RTF_GATEWAY) {
if (rt->rt_gwroute == NULL)
goto lookup;
if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
rtfree(rt);
rt = rt0;
lookup:
rt->rt_gwroute = rtalloc1(rt->rt_gateway,
RT_REPORT, ifp->if_rdomain);
if ((rt = rt->rt_gwroute) == NULL)
senderr(EHOSTUNREACH);
}
}
if (rt->rt_flags & RTF_REJECT)
if (rt->rt_rmx.rmx_expire == 0 ||
time_second < rt->rt_rmx.rmx_expire)
senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
}
esrc = ac->ac_enaddr;
switch (dst->sa_family) {
#ifdef INET
case AF_INET:
if (!arpresolve(ac, rt, m, dst, edst))
return (0); /* if not yet resolved */
/* If broadcasting on a simplex interface, loopback a copy */
if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
!m->m_pkthdr.pf.routed)
mcopy = m_copy(m, 0, (int)M_COPYALL);
etype = htons(ETHERTYPE_IP);
break;
#endif
#ifdef INET6
case AF_INET6:
if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst))
return (0); /* it must be impossible, but... */
etype = htons(ETHERTYPE_IPV6);
break;
#endif
#ifdef MPLS
case AF_MPLS:
if (rt)
dst = rt_key(rt);
else
senderr(EHOSTUNREACH);
if (!ISSET(ifp->if_xflags, IFXF_MPLS))
senderr(ENETUNREACH);
switch (dst->sa_family) {
case AF_LINK:
if (((struct sockaddr_dl *)dst)->sdl_alen <
sizeof(edst))
senderr(EHOSTUNREACH);
memcpy(edst, LLADDR((struct sockaddr_dl *)dst),
sizeof(edst));
break;
case AF_INET:
if (!arpresolve(ac, rt, m, dst, edst))
return (0); /* if not yet resolved */
break;
default:
senderr(EHOSTUNREACH);
}
/* XXX handling for simplex devices in case of M/BCAST ?? */
if (m->m_flags & (M_BCAST | M_MCAST))
etype = htons(ETHERTYPE_MPLS_MCAST);
else
etype = htons(ETHERTYPE_MPLS);
break;
#endif /* MPLS */
case pseudo_AF_HDRCMPLT:
eh = (struct ether_header *)dst->sa_data;
esrc = eh->ether_shost;
/* FALLTHROUGH */
case AF_UNSPEC:
eh = (struct ether_header *)dst->sa_data;
memcpy(edst, eh->ether_dhost, sizeof(edst));
/* AF_UNSPEC doesn't swap the byte order of the ether_type. */
etype = eh->ether_type;
break;
default:
printf("%s: can't handle af%d\n", ifp->if_xname,
dst->sa_family);
senderr(EAFNOSUPPORT);
}
/* XXX Should we feed-back an unencrypted IPsec packet ? */
if (mcopy)
(void) looutput(ifp, mcopy, dst, rt);
#if NCARP > 0
if (ifp0 != ifp && ifp0->if_type == IFT_CARP)
esrc = carp_get_srclladdr(ifp0, esrc);
#endif
if (ether_addheader(&m, ifp, etype, esrc, edst) == -1)
senderr(ENOBUFS);
#if NBRIDGE > 0
/*
* Interfaces that are bridgeports need special handling for output.
*/
if (ifp->if_bridgeport) {
struct m_tag *mtag;
/*
* Check if this packet has already been sent out through
* this bridgeport, in which case we simply send it out
* without further bridge processing.
*/
for (mtag = m_tag_find(m, PACKET_TAG_BRIDGE, NULL); mtag;
mtag = m_tag_find(m, PACKET_TAG_BRIDGE, mtag)) {
#ifdef DEBUG
/* Check that the information is there */
if (mtag->m_tag_len != sizeof(caddr_t)) {
error = EINVAL;
goto bad;
}
#endif
if (!memcmp(&ifp->if_bridgeport, mtag + 1,
sizeof(caddr_t)))
break;
}
if (mtag == NULL) {
/* Attach a tag so we can detect loops */
mtag = m_tag_get(PACKET_TAG_BRIDGE, sizeof(caddr_t),
M_NOWAIT);
if (mtag == NULL) {
error = ENOBUFS;
goto bad;
}
memcpy(mtag + 1, &ifp->if_bridgeport, sizeof(caddr_t));
m_tag_prepend(m, mtag);
error = bridge_output(ifp, m, NULL, NULL);
return (error);
}
}
#endif
mflags = m->m_flags;
len = m->m_pkthdr.len;
s = splnet();
/*
* Queue message on interface, and start output if interface
* not yet active.
*/
IFQ_ENQUEUE(&ifp->if_snd, m, NULL, error);
if (error) {
/* mbuf is already freed */
splx(s);
return (error);
}
ifp->if_obytes += len;
#if NCARP > 0
if (ifp != ifp0)
ifp0->if_obytes += len;
#endif /* NCARP > 0 */
if (mflags & M_MCAST)
ifp->if_omcasts++;
if_start(ifp);
splx(s);
return (error);
bad:
if (m)
m_freem(m);
return (error);
}
